Appreciated or not, I don't think anyone can confirm that. However, this is what we can confirm: the first test flight of a WS10A installed J10B happened in August 31st last year. From then till now, only 5 months have passed. I think this type of test require at least one year or so of continuous test flight, don't you think? After the whole series test is done and the bird is finally ready for entering service, still it will take at least one year for manufacturing.
So the conclusion is clear, J10B with WS10A or its later variants won't happened before 2014, or 2013 if being optimistic. And if FC20 is to join PAF this year, it won't come with WS10A.